Hello,
I have the following difficulty.
My project:
MyBoard (microSD and Memory NAND)
`—> MLO → u-boot.img → uEnv.txt → go 0x80100000;
I’m using my IFS in NAND memory.
But now you need to access other areas of the NAND memory, or even create a FAT partition to map dev and access, any suggestions?
HI,
You can’t use FAT with NAND memory.
If you want to use FAT with µSD card :
I assume raw SD card is mounted in /dev/hd0
Of course, some filesystem libraries have to be present in your IFS for this to be working.
Nicolas
Yes, uSD I managed to work!
I thought about using something like Linux MTD but using QNX and own .IFS and a FAT partition with MTD in the same NAND Flash.
Worst case, have to handle a “piece” NAND Flash “read, erase, write” with the QNX.
Worst case, have to handle a “piece” NAND Flash “read, erase, write” with the QNX.
See etfs. Divides flash into a “raw” portion (where you put your boot image(s)) and a read/write filesystem (type etfs) in the remainder.
I did not find a guide on QNX to handle etfs as you mentioned. You would have something to show me the document/guideline about etfs?
Here are link of interest to you :
For all this to work, you need a FLASH driver of type devf-xxx
This driver should be in your BSP.
You can get additional information on how to use it here :
You can play with this one (FLASH filesystem simulator) :
qnx.com/developers/docs/660/ … 1_4_5_4_41
Had used the devf-ram, it works perfectly, however, the data is lost when you restart.
I’m having trouble to create a “partition” raw for ETFS with mkefs, it must be correct empty?
I used the example of mkfs, but as I “access” it or mount through the ifs?
As its name tells it, file system managed by devf-ram is in RAM. So its content vanishes when powering off/restarting.
Yeah! I use almost similar to Linux tmpfs.
Does using a .IFS image I can “mount” a recorded .etfs in NAND?
Why do you want to mount an IFS in NAND FLASH ?
You can mount an IFS where you want with mount_ifs : qnx.com/developers/docs/660/ … _4_5_13_26
Thank you Nico.
What I want is actually through the QNX IFS to mount something to read-write using NAND Memory.
As the attached image.
My boot is in Memory NAND with QNX IFS in read-only.
Must persist some configuration files that can be changed.
I’m trying to use the Combine Image to work with IFS and EFS (rw).
Unless U-boot can read ETFS, your IFS has to be in raw FLASH memory section. The ETFS section will be mapped further.
Right!
U-boot does not understand EFS / ETFS.
I’m recording the IFS in format raw in the NAND memory.
I want the IFS access EFS / ETFS for rw, I saw the “Combine Image” but had no success, it seems to me a way out.
You must mount the etfs from the IFS startup script (in your build file).
Right. But you must have the devil-may driver for this, right? I tried to devf-generic but without success.
I can “mount” ETFS without this devf-? My case is a NAND Micron.
Usually, the devf driver sources needed for your board are in the BSP in src/hardware/flash.
Yes. But I’m using BSP I downloaded the QNX website does not. I will try to see some other than use this Micron memory.
Some example for dvd- driver for Micron Flash?
The BeagleBoard-xm uses Flash Micron, but devf- generates the error ‘Bus Error’ I have no knowledge with drivers for QNX.